I am also experiencing this, using an NVidia card, so it might not be a graphic hardware-related issue, or (unlikely) an issue affecting ATI, NVidia and Intel graphic cards (that is, almost every computer).
I am also experiencing this, using an NVidia card, so it might not be a graphic hardware-related issue, or (unlikely) an issue affecting ATI, NVidia and Intel graphic cards (that is, almost every computer).